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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fae6b1ff148ea1afbc3810a58b8b6b27ad05499f23857f73050f7979a5baa62e' 
  AND token = '/ikhlvoyqrURvdgORSmc8Y7pe83Tr2KIkik0aT92rW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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