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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '760c80c7d33ff93b67a380bd4f3e04ea69b493da06a5d6a2e3c30d8730955023' 
  AND token = 'axRDsKoBTG6we26Fp8Sy3rrmc+08//l7JZhRaCoV8cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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