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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc120180f7280a28e55d832b659892ee2856500cadd90a7154aaba25b3525cb' 
  AND token = 'W6hO3qdxOPbEA+zfhjni7Q5OyeCHnP80gDuFPhkOj6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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