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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '432e1854f9926683c726d1dd7150fc5728d315ebd9360631aa4276e4da2bd3b4' 
  AND token = 'EnesFu8s/BOZeWNsZcqsvs/jsr53gU4ZSXZSOdSavM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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