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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61f8fb0569a86f83fb34330b3da468c305ef1baa1056085f5662558f7b5fc26e' 
  AND token = 'OiyKnra1Lvb4kHumcZXb4NAkc5I1P+ojwGfPGJIjrc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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