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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '797782c96e2064985efeaa65eb2c9c1ef38d87de5a0216f43b7754e72bb9aeb3' 
  AND token = 'Tb4U1i9Ph3x/b15I6UIa/+kNovpoH77v2x6sUZxA8Z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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