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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2cafc7c631c5d9023017f7eb50846d3e785a02494a07647aa8d3b67c6ecb626' 
  AND token = '0FPr19hJ09nsDJ+bl/wMXw2/2NAI7dN/V3igVW4RgGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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