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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb37166c2b14789cbe801281387b2eec4904dc1e0982f3abafb6f8faeda91530' 
  AND token = 'AclGAnokLfODGjAhaTlDo44O2/D+5qAvFP2acmXEgGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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