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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb4c91fd8b669661f7ab3cadd0c5396e653a29d9317489c0e0cf6c4736400e9c' 
  AND token = 'sFFF/VPdtCWL794pnB1xg3Q5uHAI0dC07oJgda6fRjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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