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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1705977c9089d36cd91d56f53d0e7b96bfede5a1070521435a37272370c785d' 
  AND token = 'eBaoRQ/r5GGpZdW1WRLc2QPoo06MFvSzL4Ft7u4rOyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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