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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b165ebc751850c7dd07be88606f7dd2b6048153ca4c1a94453841aec15dc1ae' 
  AND token = 'X4RY/fAOGWXYb05uL4nd0eMtV1TVB38rjHkudHsIEe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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