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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85379a6be07b0934ebc811224fb75b84e7cf25932c475e9e8eb785ad056470e9' 
  AND token = 'Ayz6E3jDI2Te/93tLo5j/oAdNDUZr/Qiv/BOIRppMlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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