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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0ce0530f45aaca9f844fad5d81f030325e052718f2fda3d302d00a3e584dec6' 
  AND token = 'nekmPWgX0bqf7QtNo/7dyyrrZtKbsgc6qS8i56emLTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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