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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc1145ba64af2d23633242bbb1e8957b876ffedd3b41a96bbc145f77f247862c' 
  AND token = 'hMj2znQzVJlb8k34jGlHPSU32NfZho5O0NnXYPjHcj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}