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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7ea0045cea51b3e4684984859bc6bc6db45ff0c72ba13f4682b80a71a25779e' 
  AND token = 'OYPfDygoPFMHquTwmd98n2u32Lctjxw6iFFYTi+ji/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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