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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32abcab6f1c2e4da0dbcdf59d0eb2ef20d79746d19e6cab6ab2ec666281b6766' 
  AND token = 'fvJMvWYZUE2AXfhIiPrAViLmnkQqWd5W2qM45gwj7RY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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