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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6f2237fad8ce87445cc84dc51b6e8092559f67c45ed668784deeae3f84ba6100' 
  AND token = 'pnrrxhz2b0dEszNnRO/GPePfD450ygMN9GpUgoxScG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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