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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa1bc765f58305d28ced8359628f85de3fe13340fbf82a5fcb459886bf11baa' 
  AND token = 'XrlBnCTciA3weoirp3D2abm0/UhsBA7wNgdqwBlFuik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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