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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '870f0b94a16866d8ba11cc68d62e702ce6c14875e581617349107c19f0461e92' 
  AND token = 'Yf/qiRpwb0JJTP3JcCLeprXKiUQNyJkZO7mf2WPizAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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